A robotics team in Nevada has built an autonomous droid that can survey the health of bridges completely on its own using ground penetrating radar.

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Inspecting the steel plates inside bridges used to be a very slow and expensive process, which involved teams of surveyors having to drill into the surrounding concrete to check the steel inside. It was improved in the 1980s with the introduction of radar (which removed the drilling element), but now a team from the University of Nevada has come up with a robot that could also remove the need for humans completely.